An amendment that alters the representation of the States in Parliament requires, in addition to a special majority of each House,

Explanation

1. 01

   Provisions touching the federal structure need a special majority in each House plus ratification by the legislatures of not less than half the States.

2. 02

   That category covers the election of the President, the division of legislative powers, the representation of States in Parliament, and the Supreme Court and High Courts.

3. 03

   There is no referendum route to amendment in the Indian Constitution, and no requirement that every State agree.